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Wed, 21 Dec 2011 10:41:08 PST X-Mailer: YahooMailWebService/0.8.115.331698 References: Message-ID: <1324492868.27512.YahooMailNeo@web83901.mail.sp1.yahoo.com> Date: Wed, 21 Dec 2011 10:41:08 -0800 (PST) From: Kelly Troyer Reply-To: Kelly Troyer Subject: off topic, propeller carving and paint To: Rotary motors in aircraft Cc: DYKE DELTA In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-1845018258-1094099166-1324492868=:27512" ---1845018258-1094099166-1324492868=:27512 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Ernest,=0A=A0=A0 Just an observation but with the 3.17 ratio would your pro= p be somewhat more=0Aefficient if it were longer than 1.7m (approx 67 inche= s) considering it will be turning=0Aonly 1893 rpm at 6000 engine rpm.......= .....With my 2.85 ratio=A0RD1C I ordered my=0A"IVO" Magnum at 74 inch diame= ter (knowing it is easily shortened if necessary)=0Awhich is the=A0at the o= uter max=A0diameter=A0usable=A0on the Dyke Delta(Tom Bauer had =0Aa 74 inch= last I heard)..........The 2.85=A0 redrive gives about 2100 prop rpm at 60= 00 =0Aengine rpm which is still fairly low...........=A0=0A=0A=A0=0AKelly T= royer=0A"DYKE DELTA JD2" (Eventually)=0A"13B ROTARY"_ Engine=0A"RWS"_RD1C/E= C2/EM2=0A"MISTRAL"_Backplate/Oil Manifold=0A"TURBONETICS"_TO4E50 Turbo=0A= =0A=0A________________________________=0AFrom: Ernest Christley =0ATo: Rotary motors in aircraft =0A= Sent: Tuesday, December 20, 2011 12:16 PM=0ASubject: [FlyRotary] Re: off to= pic, propeller carving and paint=0A=0AShort answer:=0A1.7m diameter, with a= 3.33m pitch.=A0 I'm using a 3.17 reduction gearset, with an "optimistic" o= utput of 199Hp from the=0Aengine, and I was aiming for an aggressive cruise= prop under the assumption that cutting off pieces is much easier than=0Ast= apling them on 8*)=0A=0ALong answer:=0ALook up JavaProp at http://www.mh-ae= rotools.de/airfoils/javaprop.htm=0AYou can download the app from his page, = or just run it from the web.=A0 Enter the following:=0A2-blade=0A1730 RPM= =0A1.7m diameter=0A0.16m spinner=0A75m/s velocity=0A141000 W of power=0Asqu= are tip=0A=0AIn the airfoils tab:=0AMH126 at 6*=0AMH112 at 2*=0AMH114 at 2.= 5*=0AE193 at 3.5*=0A=0AGo back to the Design tab and click "Design It!" at = the bottom.=A0 On the Multi-Analysis tab, click "Analyze!" at the=0Abottom.= =A0 More numbers than a person knows what to do with.=0A=0AI am not delusio= nal enough to think that this first example will be a perfect match.=A0 It = will hopefully get me some good=0Adata on the upper limit of what my engine= /airframe combination will handle; but, more than that, it is meant for me = to=0Airon out the construction process.=0A=0AThe core is southern white pin= e (cheap, light, soft, and carves nicely), with a heavy layer of glass to c= arry the loads.=0AOver the course of making this one, I've learned how to o= rganize the milling to minimize the amount of cutting=0Anecessary, and how = to get the cutter down a 6" hole.=A0 I had to switch the cutting head from = a laminate router, to an=0Aelectric die grinder.=A0 To rough it in, I was o= riginally cutting a grid at 1" intervals and then chiseling away the=0A"non= -propeller" chunks.=A0 I'm now just cutting cross-wise slots at 6" interval= s and chiseling off the excess.=A0 Makes a=0ABIG difference when you're cut= ting head movement is limited to about 5"/min.=0A=0A=0ATracy wrote:=0A> Onl= y a glimpse of the full blade but it looked like one hell of a high=0A> pit= ch on that thing.=A0 What are the figures on it?=0A> =0A> Tracy=0A> =0A> On= Mon, Dec 19, 2011 at 3:18 PM, Ernest Christley > wrote:=0A> =0A>=A0 =A0 Ed Anderson wrote:=0A>=A0 = =A0 > Impressive, Ernest, so when do you start producing Props for the list= ?=0A>=A0 =A0 >=0A>=A0 =A0 > Ed=0A> =0A>=A0 =A0 Started already.=A0 Did you = see how slowly that cutting head was=0A>=A0 =A0 moving?=A0 I don't think mo= st of us here will be alive by=0A>=A0 =A0 the time I'm ready to ship in qua= ntity 8*)=0A> =0A>=A0 =A0 >=0A>=A0 =A0 > ----------------------------------= ----------------=0A>=A0 =A0 > From: >=0A>=A0 =A0 > Sent: Monday, December 19, 2011 11:18 AM=0A>=A0 = =A0 > To: "Rotary motors in aircraft" =A0 = =A0 >=0A>=A0 =A0 > Subject: [FlyRotary]= off topic, propeller carving and paint=0A>=A0 =A0 >=0A>=A0 =A0 >> Thought = you guys might be interested in the video of how my propeller=0A>=A0 =A0 >>= carving is going:=0A>=A0 =A0 >>=0A>=A0 =A0 >> http://www.youtube.com/watch= ?v=3DYzViR2agLcY=0A>=A0 =A0 >>=0A ---1845018258-1094099166-1324492868=:27512 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Ernest,
 = ;  Just an observation but with the 3.17 ratio would your prop be some= what more
effic= ient if it were longer than 1.7m (approx 67 inches) considering it will be = turning
only = 1893 rpm at 6000 engine rpm............With my 2.85 ratio RD1C I order= ed my
"IVO"= Magnum at 74 inch diameter (knowing it is easily shortened if necessary)
which= is the at the outer max diameter usable on the Dyke De= lta(Tom Bauer had
a 74 = inch last I heard)..........The 2.85  redrive gives about 2100 prop rpm at 6000 <= /SPAN>
engine rpm which is still fairly low........... <= BR style=3D"RIGHT: auto" class=3Dyui-cursor>
 
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"= _Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo=

From:= Ernest Christley <echristley@att.net>
To: Rotary motors in aircraft <flyrota= ry@lancaironline.net>
Sent: Tuesday, December 20, 2011 12:16 PM
Subject: [FlyRotary] Re: off topic, propeller carving a= nd paint

Short answer:
1.7m diameter, with a 3.33m pitch.&= nbsp; I'm using a 3.17 reduction gearset, with an "optimistic" output of 19= 9Hp from the
engine, and I was aiming for an aggressive cruise prop unde= r the assumption that cutting off pieces is much easier than
stapling them on= 8*)

Long answer:
Look up JavaProp at http://www.mh-aerotools.de/= airfoils/javaprop.htm
You can download the app from his page, or just ru= n it from the web.  Enter the following:
2-blade
1730 RPM
1.7= m diameter
0.16m spinner
75m/s velocity
141000 W of power
squar= e tip

In the airfoils tab:
MH126 at 6*
MH112 at 2*
MH114 at= 2.5*
E193 at 3.5*

Go back to the Design tab and click "Design It= !" at the bottom.  On the Multi-Analysis tab, click "Analyze!" at the<= BR>bottom.  More numbers than a person knows what to do with.

I= am not delusional enough to think that this first example will be a perfec= t match.  It will hopefully get me some good
data on the upper limi= t of what my engine/airframe combination will handle; but, more than that, = it is meant for me to
iron out the construction process.

The core is southern white pine (cheap, light, soft, and c= arves nicely), with a heavy layer of glass to carry the loads.
Over the = course of making this one, I've learned how to organize the milling to mini= mize the amount of cutting
necessary, and how to get the cutter down a 6= " hole.  I had to switch the cutting head from a laminate router, to a= n
electric die grinder.  To rough it in, I was originally cutting a= grid at 1" intervals and then chiseling away the
"non-propeller" chunks= .  I'm now just cutting cross-wise slots at 6" intervals and chiseling= off the excess.  Makes a
BIG difference when you're cutting head m= ovement is limited to about 5"/min.


Tracy wrote:
> Only a = glimpse of the full blade but it looked like one hell of a high
> pit= ch on that thing.  What are the figures on it?
>
> Tracy<= BR>>
> On Mon, Dec 19, 2011 at 3:18 PM, Ernest Christley <echristley@att.net
> <mailto:echristley@att.net>= > wrote:
>
>    Ed Anderson wrote:
>  =   > Impressive, Ernest, so when do you start producing Props for th= e list?
>    >
>    > Ed
>
= >    Started already.  Did you see how slowly that cuttin= g head was
>    moving?  I don't think most of us here= will be alive by
>    the time I'm ready to ship in quanti= ty 8*)
>
>    >
>    > -------= -------------------------------------------
>    > From:= <echristley@nc.rr.com <mailto:echristley@nc.rr.com>>
>    > Sent: Monday,= December 19, 2011 11:18 AM
>    > To: "Rotary motors in= aircraft" <flyrotary@lancaironline.net
>&n= bsp;   <mailto:flyrotary@lancaironline.net&g= t;>
>    > Subject: [FlyRotary] off topic, propeller = carving and paint
>    >
>    >> T= hought you guys might be interested in the video of how my propeller
>= ;    >> carving is going:
>    >>
= >    >> http://www.youtube.com/watch?v=3DYzViR2agLcY
= >    >>
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